Joint



B. C. ROCKWELL WOODEN STRUCTURE JOINT. PPLICATION FILED m4 Patented July1, 1919.

moses 2;

UNITED STATES PATENT OFFICE.

em) 0. ROCKWELL, or cnivmnmnannivsns Application madam 5,1918Seria1IiTol210,568.

To all whom it may concern:

Be it knownthat I, Bren G. RooKwnLL,

Camden, Arkansashave inventeda certain new and useful Improvement inWooden- Structure Joints, of which the following is a full, clear, andexact description, such will enable others skilled in the art to whichit appertains to make and use the same, reference being had to theaccompanying drawings, forming part of this specification."

My invention relates generallyto wooden structures and more specificallytoa mortise and tenon jolnt and themethodfof producing same. it

- The joint resulting from the practising of my improved method isapplicable fora wide variety of uses, for instance, in the formation ofthe walls of boxes or lilre corr tainers, for the sidewalls of thebodies of wagons carriages and the like, for interior finishandfittings, such as casings, wailinscoting and paneling, for theconstruction of slab doors, or in any structure wherein a number ofpieces or sections of wood are glued together at their edges andconnected at their ends to rails or framing members.

The principal object of my invention is to provide simple and efficientmeans for maintaining the panel strips or members in assembled relationand to provide simple means for squeezing together the tenon parts oftwo adjacent panel members, thereby forming and maintaining a perfectjoint or glue line between said members.

Further objects of my invention are, to provide a mortise and tenonjoint construction which can be produced very economically, therebyeffecting a material saving in the manufacture of the finished pieces,and further to provide a construction wherein the parts are firmlysecured in assembled relation.

With the foregoing and other objects in view, my invention consists incertain novel features of construction and arrangement of parts,hereinafter more fully described and claimed, and illustrated in theaccompanying drawings, in which- Figure 1 is a perspective view of apanel constructed in accordance with my invention.

Fig. 2 is a perspective view of a rail in which is formed a series ofmortises as contemplated by my invention.

Fig. 3 is a perspective view of a pair of be inserted into the mortise.Referring by numerals tothe accompanying drawings which illustrate awooden structure produced in accordance with my "improved method, 10designates a wooden or narrowest spendin mortlse.

woonun-s'raucruan Joint.

Paaneda i, 1919.

panel strips or members, the ends of which are-provlded with teno-ns. acitlzen of the United States, residing at Fig. 4: is asectional vlew ofa structure made up ofa niunbcr ofparts, the same beinvention.

Fig. 5 is a vertlcal section taken approximately on the line 55 of Fig.4. Fig. 6 is a detail sectional view of parts of astructure with thetenon in position to strip or rail in which is formed a series ofmortises 11. The ends of the panel members 12 which are to be oined tomember 10 are provided adj acfent to their edges with tenons 1 3,- thethickness or transverse dimension thereof being approximately equal tothe dimension of the corre- The width of a pair of complementary tenons13 is slightly greater than the greatest width of the correspondingmortise and thus, when a pair of the tenons are forced into the mortise,said tenons will necessarily be pressed or squeezed toward eachother inorder to be properly seated in said mortise. The different dimensionsjust referred to are graphically illustrated in Fig. 6, wherein thedotted line 02 indicates the greatest width of the mortise and thedotted line 2 illustrates the greatest width of a complementary pair ofthe tenons. In order that a pair of the tenons will enter the mortise.the outer faces of said tenons are tapered or beveled as designated by14.

When two or more of the panel members are assembled for connection to arail memher, the edge of one panel member and its tenon is provided witha longitudinally disposed rib 15 and the edge of the adjacent panelmember is provided with a longitudinally disposed groove .16. Thistongue and groove arrangement is materially effective in maintaining thepanel members in proper assembled relation and tendsto prevent thecentral portions thereof from warping or buckling away from each other.

Before two of the panel members are brought into assembled relation, theedges provided with the tongue and groove are coated with a suitableadhesive, such as glue, and thus when thetenons on the panels are:semble the forced into the mortises of the rail members, the joint orglue line between the panel members is made very tight, by virtue of thefact that the complementary tenon on the panels are squeezed or forcedtoward each other with considerable pressure While they are being forcedinto the mortises.

It will be understood, of course, that con siderable pressur is requiredto properly aspanels and rails of a structure, and for performing thisoperation I prefer to use a press operated by steam or any suitablepower, and said press being of sufficient size to act simultaneouslythroughout the entire length of the assembled structure.

My improved method of producing joints can be very easily practised, isapplicable for a wide Variety of uses, and by locating the tenons on theedges of the panel members and forming said tenons in complementarypairs, a very firm and substantial joint or glue line is formed betweenthe meeting edges of the panels and said joint is main tained andsupported by the pressure or squeeze imparted to the tenons when theyare forced into the mortises.

I am aware that my improved joint structure is capable of variousadaptations and modifications Without departing from the Copies of thispatent may be obtained for five cents each, by addressing the spirit ofthe invention, the scope of which is set forth in the appended claims.

I claim:

1. In a permanent wooden joint structure a member having a mortise, apair of panel members arranged edge to edge, the engaging edges of saidpanel members having a tongue andgroove connection, complementary tenonsformed integral with and proj ecting outwardly from the ends of saidpanel members adjacent to the meeting edges thereof, the greatest widthof the combined tenons being greater than the breadth of the mortise,and the outer ends of said tenons being tapered so as to readily enterthe mortise.

2. In a permanent wooden joint structure a member having a mortise, apair of panel members arranged edge to edge, complementary tenons formedintegral with and projecting outwardly from the ends of said panelmembers adjacent to the meeting edges thereof, the width of the combinedtenons being greater than the breadth of the mortise, and the outer endsof said tenons being tapered so as to readily enter the mortise.

In testimony whereof I hereunto aflix my signature, this 1st day of Jany, 1918.

BYRD C. ROCKWELL.

Commissioner of Patents,

Washington, II). G.

